Global Patent Index - EP 0675104 A1

EP 0675104 A1 19951004 - Process for adiabatic preparation of mononitrohalogenbenzenes.

Title (en)

Process for adiabatic preparation of mononitrohalogenbenzenes.

Title (de)

Verfahren zur adiabatischen Herstellung von Mononitrohalogenbenzolen.

Title (fr)

Procédé pour la préparation adiabatique de mononitrohalogénobenzènes.

Publication

EP 0675104 A1 19951004 (DE)

Application

EP 95103944 A 19950317

Priority

DE 4411064 A 19940330

Abstract (en)

Prodn. of mononitro halobenzenes (I) comprises reacting the corresp. halobenzene (II) with a mixt. of HNO3, H2SO4 and H2O. The process comprises as follows: (a) the reactants are fed in any order into a reactor equipped with a mixing device, provided that: (i) the amt. of HNO3 is 1-8 wt.% and the amt of H2SO4 is 56.5-84.5 wt.% of the total amt. of HNO3, H2SO4 and H2O; (ii) the H2O is added as such and/or as a diluent for the HNO3 and/or H2SO4; and (iii) the (II):HNO3 molar ratio is 0.9-1.5:1; (b) the mixing energy is 1-40 (esp 3-30) w/l of reaction mixt.; (c) the reaction is effected under adiabatic conditions, the reactants being fed at a temp. such that mixing takes place at 60-160 degrees C and the temp. at the end of the reaction is not more than 180 degrees C; (d) the product mixt. is sepd. into an organic phase and an inorganic phase; and (e) the largely HNO3-free inorganic phase is distilled to remove H2O.

Abstract (de)

Mononitrohalogenbenzole können hergestellt werden, indem man Halogenbenzol, Salpetersäure, Schwefelsäure und Wasser gleichzeitig oder sukzessive in ihrer Gesamtmenge intensiv miteinander vermischt und im Falle der kontinuierlichen Herstellung mindestens zweimal redispergiert, wozu eine Mischenergie von 1-40 Watt pro Liter des gesamten Reaktionsgemisches, bevorzugt 3-30 W/l, angewandt wird, bei kontinuierlicher Durchführung die Rückvermischung weitgehend unterdrückt und adiabatische Reaktionsbedingungen einhält.

IPC 1-7

C07C 205/12; C07C 201/08

IPC 8 full level

C07C 201/08 (2006.01); C07C 201/16 (2006.01); C07C 205/12 (2006.01)

CPC (source: EP US)

C07C 201/08 (2013.01 - EP US)

C-Set (source: EP US)

C07C 201/08 + C07C 205/12

Citation (search report)

Designated contracting state (EPC)

BE DE FR GB IT NL PT SE

DOCDB simple family (publication)

EP 0675104 A1 19951004; EP 0675104 B1 19990609; DE 4411064 A1 19951005; DE 59506135 D1 19990715; JP H07278062 A 19951024; US 5714647 A 19980203

DOCDB simple family (application)

EP 95103944 A 19950317; DE 4411064 A 19940330; DE 59506135 T 19950317; JP 9011895 A 19950324; US 78557797 A 19970121